Tempe , also known as Hayden's Ferry during the territorial times of Arizona, is a city in Maricopa County, Arizona, United States, with the Census Bureau reporting a 2017 population of 185,038. The city is named after the Vale of Tempe in Greece. Tempe is located in the East Valley section of metropolitan Phoenix; it is bordered by Phoenix and Guadalupe on the west, Scottsdale on the north, Chandler on the south, and Mesa on the east. More from Wikipedia...